There may be.
The shirt was aimed by Beckford towards the group of children. Is it his intention to pass ownership to one of them (unspecified). It is apparent to all around, no other adult makes a move to take it. It is therefore theirs to determine the ownership.
The individual then moves in and wrestles the shirt away from a boy from the group who wasn't distracted by the stewards intervention. Only he and her are left grappling for the shirt. He then gives up.
The question here is of intended ownership, and it wasn't for her. At one stage, earlier in the video, another adult is caught up in the group but tries to move away, having no intention of taking it. So he understood.
There are grounds for accusation of theft, assuming she is not the Mother of the boy(s) involved.
Who cares.............It's Jermaine Beckford(Not Lionel Messi). Its Preston NE (not Barcelona). Its League 1 Play off final (Not Champions League Final). Anyone who pays anything more than the normal £40 for the cost of the shirt is absolutely nuts. The young boys parents are apparently about to sell their story to the press and make even more money for their sob story. Its like effin Xfactor and the ''My Nan has got Alzheimer's, please let me go through coz she is my biggest fan''.
PS : Lets hope someone from Brighton is fighting over a Brighton players shirt, next May